Side Effects

Along with its needed effects, a medicine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.

Check with your doctor immediately if the following side effects occur, because they may mean that you are developing a problem with blood circulation:

Less common or rare

Anxiety or confusion (severe)

change in vision

chest pain

increase in blood pressure

muscle pain

pain in arms, legs, or lower back, especially if pain occurs in your calves or heels while you are walking

pale, bluish-colored, or cold hands or feet (not caused by cold temperatures and occurring together with other side effects listed in this section)

red or violet-colored blisters on the skin of the hands or feet

Less common or rare

Convulsions (seizures)

diarrhea

diarrhea, nausea, vomiting, or stomach pain or bloating (severe) occurring together with other signs of overdose or of problems with blood circulation

dizziness, drowsiness, or weakness (severe), occurring together with other signs of overdose or of problems with blood circulation

fast or slow heartbeat

headaches, more often and/or more severe than before

problems with moving bowels, occurring together with pain or discomfort in the rectum (with rectal suppositories only)

shortness of breath

unusual excitement

The following side effects may go away after a little while. Do not take any more medicine while they are present. If any of them occur together with other signs of problems with blood circulation, check with your doctor right away. Even if any of the following side effects occur without other signs of problems with blood circulation, check with your doctor if any of them continue for more than one hour:

More common

Coldness, numbness, or tingling in fingers, toes, or face

itching of skin

weakness in legs

Check with your doctor as soon as possible if any of the following side effects occur:

More common

Swelling of face, fingers, feet, or lower legs

Less common or rare

Absence of pulse

blurred vision

decrease in blood pressure

lightheadedness

fainting

fever

general feeling of illness

loss of appetite

lower abdominal pain

lower back pain

pounding in the ears

rapid, weak pulse

slow or irregular heartbeat

unusual tiredness

Some side effects may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:

More common

Diarrhea, nausea, or vomiting (occurring without other signs of overdose or problems with blood circulation)

dizziness or drowsiness (occurring without other signs of overdose or problems with blood circulation, especially with combinations containing dimenhydrinate, diphenhydramine, or pentobarbital)

Rare

Abdominal pain

difficulty in moving bowels

irregular bowel movements

rectal discomfort

After you stop taking this medicine, your body may need time to adjust. The length of time this takes depends on the amount of medicine you were taking and how long you took it. During this time check with your doctor if your headaches begin again or worsen.

Other side effects not listed may also occur in some patients. If you notice any other effects, check with your healthcare professional.

Call your doctor for medical advice about side effects. You may report side effects to the FDA at 1-800-FDA-1088.